Implicit numerical simulation of transonic flow through turbine cascades on unstructured grids

Y Mei, A Guha

Research output: Contribution to journalArticle (Academic Journal)peer-review

29 Citations (Scopus)

Abstract

Numerical simulation of the compressible flow through a turbine cascade is studied in the present paper. The numerical solution is performed on self-adaptive unstructured meshes by an implicit method. Computational codes have been developed for solving Euler as well as Navier-Stokes equations with various turbulence modelling. The Euler and Navier-Stokes codes have been applied on a standard turbine cascade, and the computed results are compared with experimental results. A hybrid scheme is used for spatial discretization, where the inviscid fluxes are discretized using a finite volume method while the viscous fluxes are calculated by central differences. A MUSCL-type approach is used for achieving higher-order accuracy. The effects of the turbulent stress terms in the Reynolds-averaged Navier-Stokes equations have been studied with two different models: an algebraic turbulence model (Baldwin-Lomax model) and a two-equation turbulence model (κ-ϵ model). The system of linear equations is solved by a Gauss-Seidel algorithm at each step of time integration. A new treatment of the non-reflection boundary condition is applied in the present study to make it consistent with the finite volume flux calculation and the implicit time discretization.
Translated title of the contributionImplicit numerical simulation of transonic flow through turbine cascades on unstructured grids
Original languageEnglish
Pages (from-to)35 - 47
Number of pages13
JournalProceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
Volume219(1)
DOIs
Publication statusPublished - 2005

Bibliographical note

Publisher: Institution of Mechanical Engineers

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